The Ford Barn

C26Pinelake · 10-25-2011, 09:33 AM

1930 Sport Coupe - Yesterday it was running for an hour and today After it starts it backfires a couple times and stops. It will immediately start again but it repeats the backfire and stop. Up until now run it all summer and run like a new one. Does it sound gas ( tank half full ) or ignition and if ignition where should I start looking ?
Thanks Wayne

1931 flamingo · 10-25-2011, 11:17 AM

I'd start with fuel flow to the carb, then ck points/cond.
Paul in CT

Tom Wesenberg · 10-25-2011, 11:22 AM

I always start with the easiest checks first. Holding the coil wire 1/4" from the head nut and looking for a hot blue spark is probably the easiest check. However, in this case it sounds like a fuel related problem.

Not a problem, as either spark or gas flow only takes a minute or two to check. Just do the check first rather than start by throwing new parts at the problem and hoping for the best.

johnbuckley · 10-25-2011, 11:50 AM

Yes, check the spark as always as the first step . Back firing through carb is often sign of fuel starvation, whilst it stops the fuel is seeping through to refill the carb sufficiently to restart. - Check , filters if you have any, sediment bowl, and blow through fuel pipe to dislodge any rust particles sitting in the outlet of the tank.

C26Pinelake · 10-29-2011, 09:45 PM

Could it be the timing ?

Jack '29 Sport Coupe · 11-02-2011, 05:51 PM

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Did you do anything else like remove the carburetor, or do anything to the gas lines?
If so, you might want to make sure the ferrules are not too far up on the lines because that's one thing that stops the gas flow quicker than you can blink your eye!

Jack

JBR · 11-02-2011, 06:06 PM

Check the spark plugs. Make sure they aren't fouled.
Jon

Ray With · 11-04-2011, 07:07 PM

Had the same thing and found restricted fuel flow. The shut off valve in the tank had some crap in it. Took it off and flushed it all out and been fine every since

smurph · 11-04-2011, 09:17 PM

I had a similar problem. It turned out ot be the condenser.

jkeesey · 11-04-2011, 09:26 PM

Sounds to me like a stuck float valve. The same thing happened to my a 2 weeks ago, tapped the carb a couple times and she's been running like a champ since.

Jerry in Shasta · 11-04-2011, 09:36 PM

Take off the gas cap and see it that helps
JB

10-25-2011, 09:33 AM	#1
C26Pinelake BANNED Join Date: May 2010 Location: Michigan / Ontario border, Sarnia, Ontario. 50 miles from Detroit and 150 from Toronto. Posts: 5,800	29 starts and after few seconds backfires and 1930 Sport Coupe - Yesterday it was running for an hour and today After it starts it backfires a couple times and stops. It will immediately start again but it repeats the backfire and stop. Up until now run it all summer and run like a new one. Does it sound gas ( tank half full ) or ignition and if ignition where should I start looking ? Thanks Wayne

10-25-2011, 11:17 AM	#2
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,390	Re: 29 starts and after few seconds backfires and I'd start with fuel flow to the carb, then ck points/cond. Paul in CT

10-25-2011, 11:22 AM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: 29 starts and after few seconds backfires and I always start with the easiest checks first. Holding the coil wire 1/4" from the head nut and looking for a hot blue spark is probably the easiest check. However, in this case it sounds like a fuel related problem. Not a problem, as either spark or gas flow only takes a minute or two to check. Just do the check first rather than start by throwing new parts at the problem and hoping for the best.

10-25-2011, 11:50 AM	#4
johnbuckley Senior Member Join Date: Jul 2010 Location: United Kingdom Posts: 1,444	Re: 29 starts and after few seconds backfires and Yes, check the spark as always as the first step . Back firing through carb is often sign of fuel starvation, whilst it stops the fuel is seeping through to refill the carb sufficiently to restart. - Check , filters if you have any, sediment bowl, and blow through fuel pipe to dislodge any rust particles sitting in the outlet of the tank.

10-29-2011, 09:45 PM	#5
C26Pinelake BANNED Join Date: May 2010 Location: Michigan / Ontario border, Sarnia, Ontario. 50 miles from Detroit and 150 from Toronto. Posts: 5,800	Re: 29 starts and after few seconds backfires and Could it be the timing ?

11-02-2011, 05:51 PM	#6
Jack '29 Sport Coupe Senior Member Join Date: May 2010 Location: Cincinnati, Ohio Posts: 798	Re: 29 starts and after few seconds backfires and Sponsored Links (Register now to hide all advertisements) Did you do anything else like remove the carburetor, or do anything to the gas lines? If so, you might want to make sure the ferrules are not too far up on the lines because that's one thing that stops the gas flow quicker than you can blink your eye! Jack __________________ Cincinnati, Ohio

11-02-2011, 06:06 PM	#7
JBR Senior Member Join Date: May 2010 Location: Iowa Posts: 346	Re: 29 starts and after few seconds backfires and Check the spark plugs. Make sure they aren't fouled. Jon

11-04-2011, 07:07 PM	#8
Ray With Senior Member Join Date: Jul 2011 Location: Montgomery,Texas Posts: 115	Re: 29 starts and after few seconds backfires and Had the same thing and found restricted fuel flow. The shut off valve in the tank had some crap in it. Took it off and flushed it all out and been fine every since __________________ Hotrodchat's Picture Gallery 26,000 pictures to keep you looking

11-04-2011, 09:17 PM	#9
smurph Senior Member Join Date: May 2010 Location: Cold Spring Harbor, NY Posts: 102	Re: 29 starts and after few seconds backfires and I had a similar problem. It turned out ot be the condenser.

11-04-2011, 09:26 PM	#10
jkeesey Senior Member Join Date: Apr 2011 Location: Glenmoore Pa Posts: 1,644	Re: 29 starts and after few seconds backfires and Sounds to me like a stuck float valve. The same thing happened to my a 2 weeks ago, tapped the carb a couple times and she's been running like a champ since.

11-04-2011, 09:36 PM	#11
Jerry in Shasta Senior Member Join Date: Jun 2010 Location: (Old)Shasta (Redding) CA Posts: 385	Re: 29 starts and after few seconds backfires and Take off the gas cap and see it that helps JB